drivers/staging/media/atomisp/include/media/lm3642.h

   1 /*
   2  * include/media/lm3642.h
   3  *
   4  * Copyright (c) 2010-2012 Intel Corporation. All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version
   8  * 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.
  17  */
  18
  19 #ifndef _LM3642_H_
  20 #define _LM3642_H_
  21
  22 #include <linux/videodev2.h>
  23 #include <media/v4l2-subdev.h>
  24
  25 #define LM3642_NAME    "lm3642"
  26 #define LM3642_ID      3642
  27
  28 #define v4l2_queryctrl_entry_integer(_id, _name,\
  29                 _minimum, _maximum, _step, \
  30                 _default_value, _flags) \
  31         {\
  32                 .id = (_id), \
  33                 .type = V4L2_CTRL_TYPE_INTEGER, \
  34                 .name = _name, \
  35                 .minimum = (_minimum), \
  36                 .maximum = (_maximum), \
  37                 .step = (_step), \
  38                 .default_value = (_default_value),\
  39                 .flags = (_flags),\
  40         }
  41 #define v4l2_queryctrl_entry_boolean(_id, _name,\
  42                 _default_value, _flags) \
  43         {\
  44                 .id = (_id), \
  45                 .type = V4L2_CTRL_TYPE_BOOLEAN, \
  46                 .name = _name, \
  47                 .minimum = 0, \
  48                 .maximum = 1, \
  49                 .step = 1, \
  50                 .default_value = (_default_value),\
  51                 .flags = (_flags),\
  52         }
  53
  54 #define s_ctrl_id_entry_integer(_id, _name, \
  55                 _minimum, _maximum, _step, \
  56                 _default_value, _flags, \
  57                 _s_ctrl, _g_ctrl)       \
  58         {\
  59                 .qc = v4l2_queryctrl_entry_integer(_id, _name,\
  60                                 _minimum, _maximum, _step,\
  61                                 _default_value, _flags), \
  62                 .s_ctrl = _s_ctrl, \
  63                 .g_ctrl = _g_ctrl, \
  64         }
  65
  66 #define s_ctrl_id_entry_boolean(_id, _name, \
  67                 _default_value, _flags, \
  68                 _s_ctrl, _g_ctrl)       \
  69         {\
  70                 .qc = v4l2_queryctrl_entry_boolean(_id, _name,\
  71                                 _default_value, _flags), \
  72                 .s_ctrl = _s_ctrl, \
  73                 .g_ctrl = _g_ctrl, \
  74         }
  75
  76
  77 /* Default Values */
  78 #define LM3642_DEFAULT_TIMEOUT           300U
  79 #define LM3642_DEFAULT_RAMP_TIME         0x10 /* 1.024ms */
  80 #define LM3642_DEFAULT_INDICATOR_CURRENT 0x01 /* 1.88A */
  81 #define LM3642_DEFAULT_FLASH_CURRENT     0x0f /* 1500mA */
  82
  83 /* Value settings for Flash Time-out Duration*/
  84 #define LM3642_MIN_TIMEOUT              100U
  85 #define LM3642_MAX_TIMEOUT              800U
  86 #define LM3642_TIMEOUT_STEPSIZE         100U
  87
  88 /* Flash modes */
  89 #define LM3642_MODE_SHUTDOWN            0
  90 #define LM3642_MODE_INDICATOR           1
  91 #define LM3642_MODE_TORCH               2
  92 #define LM3642_MODE_FLASH               3
  93
  94 /* timer delay time */
  95 #define LM3642_TIMER_DELAY              5
  96
  97 /* Percentage <-> value macros */
  98 #define LM3642_MIN_PERCENT                   0U
  99 #define LM3642_MAX_PERCENT                   100U
 100 #define LM3642_CLAMP_PERCENTAGE(val) \
 101         clamp(val, LM3642_MIN_PERCENT, LM3642_MAX_PERCENT)
 102
 103 #define LM3642_VALUE_TO_PERCENT(v, step) \
 104         (((((unsigned long)((v)+1))*(step))+50)/100)
 105 #define LM3642_PERCENT_TO_VALUE(p, step) \
 106         (((((unsigned long)(p))*100)+((step)>>1))/(step)-1)
 107
 108 /* Product specific limits
 109  * TODO: get these from platform data */
 110 #define LM3642_FLASH_MAX_LVL   0x0F /* 1500mA */
 111 #define LM3642_TORCH_MAX_LVL   0x07 /* 187mA */
 112 #define LM3642_INDICATOR_MAX_LVL   0x01 /* 1.88A */
 113
 114 /* Flash brightness, input is percentage, output is [0..15] */
 115 #define LM3642_FLASH_STEP       \
 116         ((100ul*(LM3642_MAX_PERCENT) \
 117         +((LM3642_FLASH_MAX_LVL+1)>>1)) \
 118         /((LM3642_FLASH_MAX_LVL+1)))
 119 #define LM3642_FLASH_DEFAULT_BRIGHTNESS \
 120         LM3642_VALUE_TO_PERCENT(15, LM3642_FLASH_STEP)
 121
 122 /* Torch brightness, input is percentage, output is [0..7] */
 123 #define LM3642_TORCH_STEP       \
 124         ((100ul*(LM3642_MAX_PERCENT) \
 125         +((LM3642_TORCH_MAX_LVL+1)>>1)) \
 126         /((LM3642_TORCH_MAX_LVL+1)))
 127 #define LM3642_TORCH_DEFAULT_BRIGHTNESS \
 128         LM3642_VALUE_TO_PERCENT(0, LM3642_TORCH_STEP)
 129
 130 /* Indicator brightness, input is percentage, output is [0..1] */
 131 #define LM3642_INDICATOR_STEP   \
 132         ((100ul*(LM3642_MAX_PERCENT) \
 133         +((LM3642_INDICATOR_MAX_LVL+1)>>1)) \
 134         /((LM3642_INDICATOR_MAX_LVL+1)))
 135 #define LM3642_INDICATOR_DEFAULT_BRIGHTNESS \
 136         LM3642_VALUE_TO_PERCENT(1, LM3642_INDICATOR_STEP)
 137
 138 /*
 139  * lm3642_platform_data - Flash controller platform data
 140  */
 141 struct lm3642_platform_data {
 142         int gpio_torch;
 143         int gpio_strobe;
 144         int (*power_ctrl)(struct v4l2_subdev *subdev, int on);
 145
 146         unsigned int torch_en;
 147         unsigned int flash_en;
 148         unsigned int tx_en;
 149         unsigned int ivfm_en;
 150 };
 151
 152 #endif /* _LM3642_H_ */
 153